.before_screen {
  position: absolute;
  top: 50px;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 98;
  transition: all .2s;
  &.showDm {
    right: 500px;
  }
  &.hideDm {
    right: 0;
  }
  .before_image {
    background-position: center;
    background-repeat: no-repeat;
    background-size: contain;
    width: 100%;
    height: 100%;
    background-color: @baseBlack;
  }
}
